Ethernet over coax by two Telus modem
 

My house is old and only has coax outlets. So is it really possible to get another room internet over coax by another telus modem?
I know it usually needs HPNA, but its price is near another telus t3200m.

So I got another t3200m and have it connected to main modem by coax.
I did get internet from second modem through its lan port and wifi. But it always get conflicted with main modem from time to time even I changed second modem' IP address. Whenever I got assigned IP address from second modem, there is no internet. And even sometimes when I connected to main modem, I ended up with getting a IP address assigned by second modem.

How do I properly setup second modem when connecting to main modem by coax? By the way, the first modem is connected to internet by WAN port.


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